Thought it was time for an update. Well the rot is in, well in. Decited to take the roof top box and walkway off, and did not like what i found. dramatic surgery to the roof and a full strip down inside, well if you are going to do a job you might as well go mad. All i can say is they used a really nasty fibreglass insulation. fortunately my side kick is ex army and went to task in a paper onesie in the baking summer heat, job done. Then a big tin opener, snips, rivet gun and mig welder all toped of with some fiberglass resin and mat to seal and done job nice and water tight.